What movie centers around a small town where a man is shot 20 plus with a shotgun and the locals seem to not have heard anything Turns out at the end that the locals all plotted together to murder him?

What movie centers around a small town where a man is shot 20 plus with a shotgun and the locals seem to not have heard anything Turns out at the end that the locals all plotted together to murder him?
A Bad Day at Black Rock